Who are you to judge whether or not me bashing down a level 11 character is RP or not? If I'm a level 15 orc and they're a level 11 elf I am not required to give a reason why you get bashed down. Hell even if I was a level 15 human and you were an elf I still don't have to give you a reason. Maybe I'm mute. Maybe it's within my role to not give reasons to those who I kill because they're beneath me. Maybe you were a mage and I needed that 1 PK win to get Applicant status. Maybe you're a dwarf and I'm an Outlander. Maybe I just don't like your race. Maybe I just don't like your name. Maybe I was bored and wanted to see what bashing down a level 11 feels like.

Do people always give reasons why they do things IRL to the people they do it to? Nope.

RP-enforced merely means that everything done should remain within the confines of the game, i.e. in-character. It doesn't mean that I have to explain my actions to you. You are not an IMM or an ally of mine (at that point in time). It also doesn't mean that you enforce what you think is RP on me and expect me to follow it. It means that if I bash you down and loot your newbie bread and that shiny sword you got and then you go off on me about how I should enjoy my armors cause I'm the reason why this game has less players then one of us is RPing and the other is taking it OOC.